Room temperature air flows over a horizontal smooth flat plate at a freestream speed of u = 20 m/s. the plate length is l = 1.5 m and its width is b = 0.8 m. the boundary layer is tripped at its leading edge so that it is turbulent over its entire length. using results based on the 1/7th power velocity profile, evaluate the boundary layer thickness δ at the trailing edge of the plate. calculate the wall shear stress at the trailing edge of the plate. estimate the drag (due to friction) on the portion of the plate between x = 1.0 m and the trailing edge and compare this with the drag over the first 0.5 m of the plate.